Canada Revenue Agency Government of Canada
Skip to content area (Access key: x)
Skip to side menu (Access key: y)

Business Number (BN) registration

The BN is a federal numbering system which is assigned to a business (one business, one number) to deal with the Canada Revenue Agency (CRA).

Not all businesses require a BN and CRA account(s) so it is important to read Do you need an account before registering.

The CRA is asking that all new registrants provide the social insurance number (SIN) of at least one owner/director and the business activity of the business when registering.

Topics for Business account registration

Do you need an account?
This question will help you find out if you have to register

How it works
Basic information on how the BN system works

Before you register
Information you need to have in order to to register

How to register
Registering your BN by mail, phone, Internet or in person

Operating in Quebec
Information you need to know if you operate a business in Quebec

After you register
What happens after you register for a BN


Businesses that do not have complex registration requirements may be able to use our online registration service. For more information, see Business Registration Online.

Frequently asked questions

What is the difference between a Business Number (BN) and a Business Identification Number (BIN)?

What do I need to know if I am hiring a baby-sitter?

What is the difference between a partnership and a joint venture?

Forms and publications

Related topics



More Ways to Serve You!

Date modified:
2006-03-06
Top of page
Top of page
Important notices